Click on the Start Menu. It's the Windows icon in the bottom left corner.
Click on Settings.
Click on Time & language.
Click on Region & language.
Click on the language you wish to add a keyboard layout to.
Click on the keyboard you want to add.
Please note, that to change a keyboard layout using the following method, you need to have more than one keyboard layout added to your language settings.
Press and hold the Windows key
Pressing spacebar multiple times will toggle through the list of keyboard layouts you have; the layout you currently have selected will always be highlighted. See the image above for an example.